Three chest radiologists (F.Song, N.S., and Y.S., with approximately 6–32 years of experience in thoracic imaging, especially in the setting of viral pneumonias such as H1N1 and H7N9 pneumonia) reviewed the images independently, with a final finding reached by consensus when there was a discrepancy. CT has a higher sensitivity but lower specificity and can play a role in the diagnosis and treatment of the disease. Chest CT can be helpful in the diagnosis of COVID-19 in hospitalized patients as an adjunct to PCR testing and serology. Other examples are organizing pneumonia (OP) and chronic eosinophilic pneumonia. The CO-RADS classification uses features of COVID-19 on chest CT to indicate the likelihood of COVID-19 pulmonary involvement based on CT imaging (ref Prokop et al). Viral pneumonia was correctly diagnosed at the initial CT study in the remaining 49 patients with COVID-19 and two patients with adenovirus. Acute interstitial pneumonitis (AIP), also known as Hamman-Rich syndrome, is a rapidly progressive non-infectious interstitial lung disease of unknown etiology. Epidemiology. Performance of radiologists in differentiating COVID-19 from viral pneumonia on chest CT. Radiology Published online March 10, 2020. ... European journal of radiology. For instance a lobar pneumonia caused by streptococcus pneumoniae may become diffuse if the patient does not respond to the treatment. Physician Board Reviews Physician Assistant Board Reviews CME Free CME. There is a steep decline in the incidence of viral pneumonia from adolescence through the fifth or sixth decade of life. Viral pneumonia occurs due to aggression of the viral pathogens on the lung structures. 2-7 and 2-8).It is most typical of pulmonary edema (hydrostatic or permeability). Bai HX, Hsieh B, Xiong Z et al. Accessed April 15, 2020. These diseases typically present as multifocal consolidations, but sometimes they may become diffuse. The diagnosis is made by a positive PCR test, which is highly specific. Perihilar “ bat-wing ” consolidation shows central consolidation with sparing of the lung periphery (Figs. Student ... Age - Viral pneumonia is most common in the very young and in the elderly. Approximately 60 to 70% of patients with sarcoidosis have characteristic radiologic findings. The HRCT appearance of pulmonary sarcoidosis varies greatly and is known to mimic many other diffuse infiltrative lung diseases. Terminology. 2018 Oct [PubMed PMID: 30292266] Classically, "PCP" was the acronym for Pneumocystis carinii pneumonia, but the causative organism was reclassified as Pneumocystis jiroveci. Google Scholar; 12. Since December 2019, a cluster of cases with unknown pneumonia with similar clinical manifestations suggesting viral pneumonia appeared in Wuhan city, Hubei Province, China. It is considered the only acute process among the idiopathic interstitial pneumonias. 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